Open-end spinning machines provided with timing devices

ABSTRACT

Open-end spinning machine with spinning units each provided with a timing device for timing the spinning units in case of removal of temporary conditions, for instance, in remedying thread breakages. Said timing device comprises correcting regulating elements for the individual adjustment of the time constants of each spinning units; a common regulating element for the simultaneous adjustment of the time constants of all the spinning units according the currently required spinning conditions of the spinning machine is preconnected to the timing devices of individual spinning units.

[ Sept. 23, 1975 OPEN-END SPINNING MACHINES PROVIDED WITH TIMING DEVICES[75] Inventors: Karel Mikulecky, Chocen; Stanislav Esner; Miloslav Tyl,both of Usti nad Orlici, all of Czechoslovakia [73] Assignee: VyzkumnyUstav Bavlnarsky, Usti nad Orlici, Czechoslovakia [22] Filed: Mar. 7,I974 [21] Appl. No.: 448,983

[30] Foreign Application Priority Data Apr 20, I973 Czechoslovakia2853-73 [52] U.S. Cl. 307/154 [5]] Int. Cl H02j [58] Field of Search307/149, 154

[56] References Cited UNITED STATES PATENTS 3.l53,l l7 l0/l964 Hill307/l54 3.443.347 6/1969 GunnRussell t. 307/l54 3,470,424 9/1969Flesseles et al. t 307/154 3,488,755 l/l970 Pickles 307/149 PrimaryExaminerL. T. Hix

[57] ABSTRACT Open-end spinning machine with spinning units eachprovided with a timing device for timing the spinning units in case ofremoval of temporary conditions. for instance, in remedying threadbreakages. Said timing device comprises correcting regulating elementsfor the individual adjustment of the time constants of each spinningunits; a common regulating element for the simultaneous adjustment ofthe time constants of all the spinning units according the currentlyrequired spinning conditions of the spinning machine is preconnected tothe timing devices of individual spinning units.

3 Claims, 3 Drawing Figures Z 2 31 F0 \i-J', I

yrs, -1 5 51 1-5 L F US Patent Sept. 23,1975 Sheet 2 of2 3,908,134

Q A 2 p w w T U TUIIA Q D e TEL m! m P OPEN-END SPINNING MACHINESPROVIDED WITH TIMING DEVICES This invention relates to open-end spinningmachines equipped with spinning units each provided with a timing devicefor timing the spinning units in case of the removal of some temporarycondition, such as, for instance, remedying thread breakage.

In open-end spinning machines, particularly those with automated threadbreakage remedying systems, the removal of a temporary condition, i.e.the spinningin process, requires a number of individual operation stepssuch a stopping the sliver supply and the yarn take-off, starting theyarn return etc., to be undertaken in specific time relationship. Amongsuch temporary conditions are the automatic or manual remedying ofthread breakages, the stoppage of the machine, its starting, and thelike. The better the time sequence of the individual operations ismaintained by means of a convenient timing device, the higherreliability and reproducibility of the individual operational steps canbe achieved in case of yarn spinning-in.

The adjustment of the required time constants varies, of course, fordifferent working conditions of the machine, for different yarn counts,take-off and feeding speeds, etc. In addition, the individual spinningunits have never exactly equal parameters, such as, for instance, thetime constant of the feed roller clutch, the sensor sensibility and thelike, due to tolerances in manufacture, adjustment of clutches,different characteristics of various materials, and so forth.

It is an object of this invention to provide an openend spinning machinewith spinning units, wherein each individual spinning unit has its owntiming device for the time control of the spinning unit in the course ofremoval of a temporary condition; such condition for instance, may bethe remedying of thread breakages, enabling an individual adjustment oftime constants of each spinning unit according to the differentcharacter of each spinning unit, and enabling, in addition, a commonadjustment of the spinning units required according to changes in theworking conditions of the openend spinning machine.

In accordance with the invention, timing devices include correctingregulating elements for the separate, individual adjustment for the timeconstants of each spinning unit, and a common regulating elementpreconnected to the timing devices of individual spinning units, for thesimultaneous adjustment of the time constants of all spinning unitsaccording to the current spinning conditions of the spinning machine.

The time control circuit according to this invention comprises avoltage-dependent transistor circuit fed by a common supply source, witha correcting and with an operating relay to which the time controlledoperating elements of spinning units are connected, while the timecontrol circuit together with the other time control circuit of thespinning units are connected to a common regulating element of a commonsupply source.

An examplary embodiment which, of course, is not the only solutionaccording to this invention will be described in the following withreference to the accompanying drawings, in which FIG. 1 is a simplifiedblock wiring diagram of spinning units on the machine, their timingdevices and their common source of the supply voltage;

FIG. 2 is a block wiring diagram of a spinning unit; and

FIG. 3 is a wiring diagram of a time control circuit.

An open-end spinning machine 1 is provided with a number of spinningunits 2 including well-known, devices (not shown) for separating fibers,such as a feed roller, a combing-out cylinder, a channel for conveyingseparated fibers and a twisting mechanism such as, for instance, aspinning chamber; further, there is provided some arrangement for yarntake-off and wind-up, control sensors and operating devices 21 forremoval of a temporary condition of the spinning unit, for instance forremedying thread breakage, comprising clutches controlled in apredetermined time sequence by timing devices 3 interconnected to thesliver feeding drive, to the yarn take-off, and to the device forreversing the yarn take-off and wind-up. The spinning units 2 arefurther provided with respective drives, such as the drive for thefeedroller, the drive for the combing-out cylinder, the drive for thetwisting mechanism and the drive for other elements such as cleaningdevices for removal of dirt and the like.

The timing device 3 of each spinning unit 2 com prises a correctionregulating element 31, such as, in the case given, a variable resistordesigned individually to adjust the time constant of each spinning unit2.

To the timing devices 3, of which an exemplary time control circuitbased on the semiconductor principle is shown in FIG. 3, there ispreconnectcd a common regulating element 41, through which all the timecontrol circuits of the spinning units 2 are supplied from a commonsupply source 4. As the time constant of the time control circuitdepends not only on the magnitude of the variable resistor 31, but alsoon the magnitude of the feeding voltage U2, the time constants of allthe time control circuits can be adjusted by the common regulatingelement 41 which can be for instance, a multiposition switch foradjustment of the voltage U2 in steps, or a potentiometer of aregulating supply circuit of the common supply source 4.

Turning now to FIG. 3, the contacts P2 of an operating relay P connectedin the course of operation of the time control circuit within the timeinterval determined by the time constants, are connected to timecontrolled operating elements 21 of the spinning unit 2, as for instanceto a clutch interposed in the drive of the feed roller 22 and designedto interrupt, while removing temporary conditions, such as during theautomatic correction of thread breakages, the feeding of the sliver tothe combing-out cylinder for an exactly predetermined time interval inan exact time sequence with other switching operations.

The transisors T1 and T2 of the time control circuit are non-conductiveunder stationary conditions. The capacitor C1 is charged to the voltageU2. By closing a starting contact 32, of, for instance, a sensor (notshown) or of a program transmitter for removing temporary conditionscontrolled by the sensor, the time control circuit starts its operationThe transistor T1 becomes conductive and the capacitor C1 charged to thevoltage U2 is discharged through the transistor T1 and the variableresistor 31 and is again charged to the voltage U1 of opposite polarityvia said variable resistor 31. After a sufficiently high value of thevoltage on the capacitor C1 is reached, the diode D1 is opened and thusalso the transistor T2 becomes conductive, the relay P is attracted andis held in this condition by its own contact P1. The transistor T1becomes nonconductive and the capacitor C l is again charged to thevoltage U2 the relay P is released by disconnection of the startingcontact 32 and the time control circuit is again ready for operation.

The supply source U1 is a source of constant voltage, designed to feedthe operating section of the timing device. The supply source U2 is asource of a variable voltage, feeding the regulating section of thetiming device. lt is possible simultaneously to control, by way of thecommon regulating element 41, all the timing devices and thus also theoperating of all spinning units, and also to control the timing deviceof each spinning unit individually by way of the regulating element 31.

Although the invention is illustrated and described with reference to aplurality of preferred embodiments thereof, it is to be expresslyunderstood that it is in no way limited to.the disclosure of such aplurality of preferred embodiments, but is capable of numerousmodifications within the scope of the appended claims.

What is claimed is:

l. in an open-end spinning machine with spinning units each providedwith a timing device for timing the spinning units in case of removal oftemporary conditions, said timing device comprising a time controlcircuit including correcting regulating elements for the individualadjustment of the time constants of each spinning unit, and a commonregulating element preconneeted to the timing devices of the individualspinning units for the simultaneous adjustment of the time constants ofall the spinning units according to the cur rently required spinningconditions of the spinning machine.

2. The combination claimed in claim 1, wherein the time control circuitthereof comprises a voltagedepcndcnt transistor circuit with acorrecting regulation element in the form of a variable resistor and anoperating relay to which time controlled operating elements of thespinning units are connected.

3. The combination claimed in claim 2, comprising a common currentsupply source, a common regulating element connected to said commonsupply source, and wherein said time control circuit together with theother time control circuits of the spinning units are connected to saidregulating element.

1. In an open-end spinning machine with spinning units each providedwith a timing device for timing the spinning units in case of removal oftemporary conditions, said timing device comprising a time controlcircuit including correcting regulating elements for the individualadjustment of the time constants of each spinning unit, and a commonregulating element preconnected to the timing devices of the individualspinning units for the simultaneous adjustment of the time constants ofall the spinning units according to the currently required spinningconditions of the spinning machine.
 2. The combination claimed in claim1, wherein the time control circuit thereof comprises avoltage-dependent transistor circuit with a correcting regulationelement in the form of a variable resistor and an operating relay towhich time controlled operating elements of the spinning units areconnected.
 3. The combination claimed in claim 2, comprising a commoncurrent supply source, a common regulating element connected to saidcommon supply source, and wherein said time control circuit togetherwith the other time control circuits of the spinning units are connectedto said regulating element.